Xpf s seraratigg precious  w etals frofvl ores



leaving the lead behind in silver, and copper bullion, no lead.

I 4do not herein claim as use of a soluble carbonate to revive a hyposulphite leaching solution. l

The process covered by this application difthe ore. The gold, therefore, contain fers from that set forth and claimed in the ap-4 plication No. 47, 530, filed by me December 10, -1881, in' that by .that processtlie lead is removed from the ore or metallurgical product along with', the precious metals by the solution used, and is afterward precipitated from the e solution separate from such metals, while by this process herein set forth and claimed, the 'precious metals are removed from the ore while thelead is left init.

my invention the Having thus described my invention, what I -tion containing a soluble carbonate, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

lVitncsses:`

F. J. LEWIS, E. H. BRUCE.

' EDWARD -HUBBARD RUssELL.

leaching l 

